clippers and clampers
Post on 29-Oct-2014
460 Views
Preview:
TRANSCRIPT
Clippers and Clampers
Ajay Singh Raghuvanshi
Ajay Singh Raghuvanshi, IIITA 204/07/2023
CLIPPERS There are a variety of diode networks called
clippers that have the ability to “clip” off a portion of the input signal without distorting the remaining part of the alternating waveform.
Depending on the orientation of the diode, the positive or negative region of the input signal is “clipped” off.
Ajay Singh Raghuvanshi, IIITA 304/07/2023
CLIPPERS There are two general categories of
clippers: Series Clipper : The series configuration is
defined as one where the diode is in series with the load.
Parallel Clipper : The diode in a branch parallel to the load.
Ajay Singh Raghuvanshi, IIITA 404/07/2023
Series Clippers (Un-biased)The diode in a series clipper “clips” any voltage that does not forward bias it:•A reverse-biasing polarity•A forward-biasing polarity less than 0.7 V (for a silicon diode)
Ajay Singh Raghuvanshi, IIITA 504/07/2023
Biased Diode Series Clippers As in fig the direction of the diode suggests that
the signal vi must be positive to turn it on.
The dc supply further requires that the voltage v i be greater than V volts to turn the diode on.
Ajay Singh Raghuvanshi, IIITA 604/07/2023
Series Clippers When the diode is in the short-circuit state,
such as shown in Fig., the output voltage vo can be determined by applying Kirchhoff’s voltage law in the clockwise direction:
Ajay Singh Raghuvanshi, IIITA 704/07/2023
Series Clipper with voltage Source
Ajay Singh Raghuvanshi, IIITA 804/07/2023
Biased Series Clippers The negative region of the input signal is “pressuring” the diode into
the “off” state, supported further by the dc supply. In general, therefore, we can be quite sure that the diode is an
open circuit (“off” state) for the negative region of the input signal
Ajay Singh Raghuvanshi, IIITA 904/07/2023
Determine the o/p waveform
Ajay Singh Raghuvanshi, IIITA 1004/07/2023
Summary of Series Clipper Circuits
10
Ajay Singh Raghuvanshi, IIITA 1104/07/2023
Parallel Clipper
Ajay Singh Raghuvanshi, IIITA 1204/07/2023
Determine the o/p
Ajay Singh Raghuvanshi, IIITA 1304/07/2023
Parallel Clippers Forward Diode
Ajay Singh Raghuvanshi, IIITA 1404/07/2023
Parallel Clippers Reversed Diode
Ajay Singh Raghuvanshi, IIITA 1504/07/2023
Summary of Parallel Clipper Circuits
Ajay Singh Raghuvanshi, IIITA 1604/07/2023
ClamperThe clamping network is one that will “clamp” a signal to a different dc level. The network must have a capacitor, a diode, and a resistive element, but it can also employ an independent dc supply to introduce an additional shift.
Ajay Singh Raghuvanshi, IIITA 1704/07/2023
Biased Clamper Circuits
17
The input signal can be any type of waveform such as sine, square, and triangle waves.
The DC source lets you adjust the DC camping level.
Ajay Singh Raghuvanshi, IIITA 1804/07/2023
Ajay Singh Raghuvanshi, IIITA 1904/07/2023
2004/07/2023
Summary of Clamper Circuits
Ajay Singh Raghuvanshi, IIITA
Ajay Singh Raghuvanshi, IIITA 2104/07/2023
Voltage-Multiplier Circuits
Voltage Doubler Voltage Tripler Voltage Quadrupler
21
Voltage multiplier circuits use a combination of diodes and capacitors to step up the output voltage of rectifier circuits.
Ajay Singh Raghuvanshi, IIITA 2204/07/2023
VOLTAGE-MULTIPLIER CIRCUITS Voltage-multiplier circuits are employed to
maintain a relatively low transformer peak voltage while stepping up the peak output voltage to two, three, four, or more times the peak rectified voltage.
Ajay Singh Raghuvanshi, IIITA 2304/07/2023
Voltage Doubler Half wave
Ajay Singh Raghuvanshi, IIITA 2404/07/2023
Voltage Doubler Full wave
Ajay Singh Raghuvanshi, IIITA 2504/07/2023
Voltage Tripler and Quadrupler
Ajay Singh Raghuvanshi, IIITA 2604/07/2023
Practical Applications of Diode Rectifier Circuits
Conversions of AC to DC for DC operated circuits
Power supplies and Battery Charging Circuits Clipper , Clamper and Voltage multiplier
Wave shaping for signal analysis To get voltage transformation without use of
transformers Some other simple diode applications
Protective Circuits against Over current Protection against Polarity Reversal Protects against Currents caused by an inductive
kick in a relay circuit
top related